section.bannerForm{
    width: 100%;
    height: 340px;
}
section.bannerForm > .swiper-container > .swiper-wrapper > div{
    background: url("./images/lun1.jpg") no-repeat center / cover;
}
section.bannerForm > .swiper-container > .swiper-wrapper > div:nth-child(2){
    background: url("./images/lun2.jpg") no-repeat center / cover;
}
section.bannerForm > .swiper-container > .swiper-wrapper > div:nth-child(3){
    background: url("./images/lun3.jpg") no-repeat center / cover;
}
section.bannerForm > .swiper-container > .swiper-wrapper > div:nth-child(4){
    background: url("./images/lun4.jpg") no-repeat center / cover;
}
